Has anyone done metal casting off of 3D prints? (custom lightsaber parts)

[Sluis Van Shipyards]

Hey I'm just curious if anyone on here has used 3D prints to make cast metal parts? I've seen a few videos of people using special PLA filament that's made for casting (lost PLA I guess?). I thought it might be a cheat to those of us without a lathe/milling machine.

 

[bobasfett]

Seems doable if you could find the proper filament to mimic wax. No clue on that but I think the methodology makes sense

 

[RandomMaker]

Never heard of that but it seems feasible... Of course you could also print a positive model and then create a negative mold from it, and using a non-evaporative process.

My kid is going to be visiting in a few weeks and wants to do some metal casting, so this has got me thinking...